Fair power allocation to the users in a power domain nonorthogonal multiple access (PD-NOMA) networks is an essential aspect. In this paper, we have proposed a coefficient-scaling-based fair power allocation scheme, for a single cell multi-user PD-NOMA network. First, we have developed a model for two users with a fixed power allocation scheme, and proposed a modified strong user fair-power allocation scheme. Furthermore, this two-user scheme is extended for an ad-hoc multi-user PD-NOMA network and a coefficient-scaling-based approach for fair power allocation is proposed to address the outage issue. The performance of the proposed schemes is evaluated through bit-error-rate, sum-rate, outage, and fairness index. The simulation results reveal a remarkable increase in fairness performance of the proposed scheme, in comparison with a state-of-the-art method.

中文翻译：

---

基于系数缩放的多用户功率域非正交多址网络公平功率分配

在功率域非正交多址 (PD-NOMA) 网络中为用户公平分配功率是一个重要方面。在本文中，我们针对单小区多用户 PD-NOMA 网络提出了一种基于系数缩放的公平功率分配方案。首先，我们开发了一个具有固定功率分配方案的两个用户模型，并提出了一种改进的强用户公平功率分配方案。此外，该双用户方案被扩展用于自组织多用户 PD-NOMA 网络，并提出了一种基于系数缩放的公平功率分配方法来解决中断问题。所提出方案的性能通过误码率、和率、中断和公平指数来评估。仿真结果表明，所提出方案的公平性能显着提高，